How many people make mistakes, try and correct them and end up digging them selves into hole? Here is a suggestion that may prevent such things happening.
That WikiTree has a practice site, say 4 generations of fictitious names. This site has a number of deliberated errors.
This would give beginners a chance to practice merges, removable of siblings, changing spouse to mother etc etc. The site would need to be user friendly and talk you through the process if you make a mistake, so that you end up with success. The site would then reset its self on completion of some one practising on it, for the next person to use. After having a practice, you would then go to your own site and make changes with confidence.
Less work for Rangers to correct. What do you think?